protichnite
Palaeontology
noun
A fossil trail (consisting of a thin groove bordered by small impressions) occurring in Cambrian sandstone and attributed to an early arthropod; now only (in form Protichnites) as ichnogenus name.
Origin
Mid 19th century; earliest use found in Proceedings of the Royal Society of London. After scientific Latin Protichnites, ichnogenus name.